9. shot (n.) a consecutive series of pictures that constitutes a unit of action in a film
The vacuum level is determined by the pressure differential between the evacuated volume and the surrounding atmosphere. Several units of measure can be used. Most refer to the height of a column of mercury â usually inches of mercury (in.-Hg) or millimeters of mercury (mm-Hg).
Example 1. Using this formula calculate the pump down time T, to reach a vacuum level of 0.1 mbar (0.075 Torr or 75 microns) if the chamber volume is 150 cubic feet and the existing vacuum pump speed is 150 cfm. First, we need to find the pump down factor F, from the graph in Fig.1.